Motor-vehicle.



No. 880,823. PATENTED MAR. 3,1908.

G. L. REDFI ELD.

MOTOR VEHICLE.-

APPLIUATION'IILED APR. 17. 1900. RENEWED NOV. 14, 1904.

4 SHEETS-QHEET 1.

FIG. 4.

ITNESSES:

No. 880,823. PATENTED MAR. 8, 1908.

' 0. L. REDFIELD.

MOTOR VEHICLE.

APPLIOATIONIILED APR. 17. 1900. RENEWED NOV. 14. 1904.

4 SHEETS-SHEET 2.

'IYIIIII WITNESSES-.8 44 AM a3? 55; )NVENTOR'.

M @MMWJ PATENT-ED MAR. s, 1908.

0. L. ,REDPIELD. MOTOR VEHICLE. APPLICATION FILED APR-17. 1900. RENEWED NOV. 14, 1904.

4 SHEETS-SHEET 3.

FIG-.3.

Jae

W #TNESSES'.

INVENATOR 654W 0c No. 880,823. PATENTED MAR. 3, 1908. O. L. REDPIELD.

MOTOR VEHICLE.

APPLICATION riLnD APR.17, 1900. RENEWED NOV. 14, 1904.

' 4 SHEETS-SHEET 4.

6 68- I VA 4 is a l l?- uzau zuummr 6! IIIIIIII mm: 6,5

62 I 5 2 Z w 63 FIG 6.

WITNESSES 2 I N V E N T0 R'.

ITED STATES ATENT FFIQE.

CASPER L. REDFIELD, OF CHICAGO, ILLINOIS.

MOTOR-VEHICLE.

' Application an April 17. 1900. semi No.

To all whom it may concern:

Be it known. that I, CASPER L. REDFIELD, a citizen of the United States of America, and resident of Chicago, county of Cook, State of Illinois, have invented certain new and usetul Improvements in Motor-Vehicles, of which on the same axis, thoughnot necessarily on the same axle. It is also a vehicle which maintains its proper balance by the distribution of weight and not by a third support to the ground. The weight used to maintain this balance is that which is also used to propel the vehicle, hence the duocyclc is the simplest and lightest form of self-contained, power driven vehicle.

In any power driven vehicle it is necessary to furnish power enough to carry the vehicle over rough roads and up moderate grades. To avoid the necessity of using excessively heavy motors it is common to use change gearing so that the vehicle may have two or three different speeds for one speed of the motor. I have adopted this .form except that instead of having fixed ratios of change as IS commonly uscd,,I choose a maximum and mimimum of variation and then provide means for using all possible variations between the extremes. I also provide agoverning devicewhich weighs the resistance to driving the vehicle, and the, weigl'it so obtained automatically changes the speed so that the power consumed is that which is the most economical or most desirable for the motor employed.

In addition to the elements referred to in the foregoing general statement, there are certain other devices which will be more readily understood from the detailed descrip tion. I

In the accompanying drawings, Figure 1 is a side elevation; Fig. 2 is a longitudinal section; Fig. 3 is a front elevation; Fig. 4. is a horizontal sectioirof one of the wheels showing the adjacent frame work; Fig. 5 is a diagram of the driving mechanism partly in section; 6 is a section on either of the Specification of Letters Patent.

13.200. Renewed November 14. 1904. Serial No. 232.620.

are secured in the A sheet metal guard 2-4 extends Patented March 3, 1908.

lines 6-6 of Fig. 5; and Figs. 7 and 8 are details to'be hereinafter described.

In the said drawings 20 represents the ground on which the vehicle runs. The wheels 2]. are of the ordinary bicycle construction, the spokes of which are omitted in Fig. 2 and only partly shown in Fig. 1 for the purpose of avoiding a confusion of lines. The wheels 21 are loosely mounted upon a common tubular axle 2 the ends of which hubs of the inclosing frames 23. over theupper half of each wheel and is conncc'tcd to the frame 23 at the front and rear. The guards 24 are supported at several points by tubular spokes which radiate from the hubs of the frames 23. Suspended from the frames 23 is a frame work composed of tubes 25 to which is secured a shell 26. This shell contains the power devices. On the axle 22 and a cross tube 27 are two bridges 28 upon which are mounted the springs 29. Carried on the springs 29 is a chair 30, which is so arranged that a person sitting therein may tilt it backward nary office chair, and in so doing may shift the center of his gravity with respect to the axle 22. By means of a screw 31 the chair 30 may be shifted either toward the front or rear with respect to the/springs 29, so that the rider may locate his center of gravity to suit his own weight and his own ideas of the position he wishes to occupy.

Within the inclosed space below the chair 3() is a battery B composed of a series of storage cells. This battery is the heaviest part of the vehicle and is located at the lowpossible position so as to maintain the seat and rider in a desired balance. Just back of the battery B are two electric motor; M and m, the shafts of which are in line and nearly in contact. A disk 32 has its 'hub mounted on the ends of both motor shafts. A groove is cut in the end of each shaft as shown in Fig. 6, and in each. groove is placed a short piece of wire 33. shaft rotates in the direction of the arrow, the wire will bind in the hub of the disk 32 and carry it forward at the same speed as the motor. With the motor shaft standing still the disk may rotate in the same direction without affecting the motor. It'will'therefore be apparent that with this construction, the disk 32 may be driven by either motor independentlyonbv both together. A small washer 34 within the hub of the disk 32 and When the motor.

i 32 driven, the rotating between the ends of the motor shafts, )revents the wire 33 in one shaft from. con icting with the groove in the other shaft.

To the rear of, and parallel with,.the motor shafts are two shafts 35, which are in line and which carry disks 36. -The disk 32 lies between and overlaps the disks 36, and

between the disk 32 and the disks 36 are two j friction rollers 37 which are loosely mounted upon and rotate about the rods 38 which are ivoted on the'motor shafts. The rollers 37 ave their friction surfaces of rubber or some other yielding materialfand are free to' slide axially on the rods 38. With the rods 38, supported in line between the axes of the motor shafts and shafts and with the disk 37 will lie tangent to then tracks on the disks 32 and 36, and there will be no tendency for the rollers to move in either direction on their supporting rods 38.: If, however, one of the rods 38 be lowered, the rotating plane of the roller will continueto be tangent to'its track on the disk 32 but will be set'at an inclination to'its track on the disk 36. If the direction of rotation be that-of the arrows in Figs. 1 and 5, then this inclined position will cause the roller .to travel outward on the disk 36 and beforc'ed inward on the disk 32. If the rod 38 were raised above the center of disk36,

the roller would travel outward ondisk32 and inward on disk 36.

It will be obvious that with the disk 32 rotatin at a constant s'peed,a movement of the rol ers toward the .axis of the motors will cause the'disks36 to rotate more slowly while a movement an opposite direction will cause them to'rotate more rapidly. On the outer end ofeach rod 38 is an extension piece 39, the ends of which lie between limitin brackets 40 on the outside shell. On a s aft 41 supported inf-the upper part of the inclosinglshell 26 is a double armed lever 42, to the ends of which are pivoted the rods .43 that pass down through openings in the extensions 3 39.

Spring 44 and nuts 45 on the rods 43 serve to torque of thismotor, then if the resistance on the shafts 35 be uniform and the'motor m be driving, the rods 38 and their rollers 37 will remain in a horizontal position and the s eed of the shafts 35 willv be uniform. If, owever, additional resistance be thrown upon the shafts 35, thiaresistance-willbe com municated to the rollers '37 which will cause planes of the rollers the rods 38 to be depressed by compressing the springs 44. In this depressed osition the rollers travel outwards on the isks 36 and inward on the.disks 32 until the driving force and leverage has increased enough to 7" balance 'the' additional resistance, when the rods will again rise to a horizontal position and the motion become uniform. If the resistance should decrease, the springs '44 would raise the rods 38 above the horizontal x and the rollers 37 would travel to the left, increasing the, driven speed, until that speed corresponded to the resistance offered.

The mechanism just explained is in effect an automatic governor which weighs theresistance to driving and adjusts the ratio of speed between the driver and the driven so that the driven consumes a constant ower under large variations of resistance. i le this governor has been described as a con- 5 troller for a Variable speed mechanism, a little consideration will show that it is appli-' cable toa variety. of uses other than serving 'aspart of a driving mechanism for a vehicle. For example, by adjusting-the springs 44 to different tensions it may be used as a means for testing the behavior of the motorm under different loads. On the front end -of the shaft .41 is a second lever 46, to the ends ofwhich are connected the rods 4,7. that extend upward at the sides of the chair 30 and are guided in the brackets 48 thereon! The rods 47 terminate in button heads 49 that are in easy reach of the occupant of the chai'r. By pressing of the buttons 49 the'lever 42 may be. oscillated so as to increase the tension on'one spring 44 and decrease it on the other. The result of this will be to raise one rod 38' and depress'the other, thus causing 1 the rollers 37 to move in opposite directions so as to increase the speed of one disk 36 and decrease the speed of the other. As these disks are connectedto the wheels of the .ve: hicle, as will be hereinafter described, it will be evident that thewheels will be caused to run at different speeds and the vehicle to be caused to turn at the right or the left. These connections therefore servev as a means ,for adjusting the governor so that it will act 'as' a steering device.

In the -'rear upper part of the inclosing shell 26 is a shaft 50 on which'is an arm 51. ,Pivoted on the end of the arm 51 are two rodsi52 which extend downward through the extensions 39 of the rods 38. On each rod ,52 are two nuts 53 and 54, a spring 55 and a loose sleeve 56. The arm 51, and conse- 'quently the rods 52 and parts carried thereby, has three positions. The lowest position I is shown in Fig. 2. In this position the sleeves 56 are loose. in the extensions 39, and

the rods 38 may move freely up and down Within the limits permitted by the sto brackets 40 without afiecting or beinga fected by the parts carried on the rods 52. 1 0

In the middle position the collars on the sleeves 56 engage the lower faces of the extensions 39, and when these extensions are in their mid 'position, the. tensions on the springs 55 equals the difference between the torques of the large motor M and the small motor m. In other words, the combined tensions of the springs 44 and the springs 55 equals the torque of the large motor. This position is shown in Fig. 8 from-which. it will be seen that the spring 55 may raise the extension 39 or permit it to be depressed. The nut 53serves for applying the proper extension to the s ring 55, and the nut 54 serves to hold the s eeve 56 down so that its flange will not come in contact with the extension 39 when said sleeve is atits lowest position. In the third, or highest position, the rods 52 are raised enough'so that the initial tension of the spring 55, when the'extensions 39 are horizontal, equals the torque of the larger motonM. From' this description it will be seen that when the lever 51 is in its lowest position the support from the rollers 37 consists of the springs 44, the tension of whieh' equals the torque of the small motor; when in the mid-position the support consists of the sprin s 44 and with a combinedtension equa' to the torque of' the large motor; and when in the highest position the support is from the same springs but with a tension equal to the torque of both-motors. Anarm 57 and a rod 58 serveas a connection from shaft 51 to a hand lever 59 within easy reach of a person in the chair 30 so that he can move the rod 52 into any position. The lever 59 isheld in any position by means .of the quadrant 60, on which are some contact points. The two upper contact points represent electrical connections from the battery B to the small motor m and the two lower ones similar connections to the large motor M. These contact points are soar ranged that as the lever 59 is moved to throw addition tension under the rollers 37 it also connects the corresponding driving power. The springs 44 being supported from a lever 42 which isfree to'oscillate about its center, are in a somewhat unstable equilibrium, so that if one wheel of the vehicle meets more resistance than the other it may be caused to run slower and change the course of the vehicle. This is of course controllable from the buttons 49 by the rider, but to make it more stable the arms of the lever 42 are inclined downward from their pivoting. center, so that when it is oscillated there is a continued tendency for it to return to its mid-position. v

Assuming that the motors are delivering a constant power at a constant speed, which is the condition of greatest economy or. efliciency, the friction rollers 37 will transmit a greater force when near the motors than whenfarther'from them. As the pressure between the rollers and the disks must be sufiicient to transmit the force ofthe motors at whatever position they may happen ,to be, and as the force varies from the maximum near the centerof the disk 32 to the minimum near its outer edge, it will be evident that this pressure may be varied also. This increase and decrease of pressure to correspond with the force to be transmitted is accomplished by making the disk 32 tapering 'and the disk 36 dished as shown somewhat exaggerated in Fig. 5. This tapering and dishing of the disks (the anioiint of which will-depend upon the character of the material out of which the rollers 37 are made) is in the nature of an automatic means for increasing and decreasing the frictional contact. in direct proportion to the force to be transmitted.

On the outer end of each shaft is a friction roller 61which engages a flange 62 on the rim 63 of the wheel .21 for the purpose .of driving it. ings adjacent to each shaft 35 is another shaft 64 which has a roller 65 that engages the opposite side of the flange 62. rollers 66 convey power from shafts 35 to shafts 64. intended to be balanced on two wheels by the distribution of weight suspended from the axis of the wheels. The action of the rollers 61 and 65 in driving the wheels tends to turn the body of the vehicle on its axis so as to raise the -forward part and depress the rear part, and the distance (or angle) the driving force transmitted through the rollers 61' and 65. As this force varies with the resistance to driving it will be evident that this turning of the body of the vehicle will be greater at some timesthan at others. Ordinarily the driver will ad ust the position of his seat so that'the vehicle will balance under the average conditions oi the road, but as average conditions do not always exist it is desirable to provide some means ior preventing the body of the vehicle from tipping toofar forward or back. Such means is supplied iii the auxiliary wheels or rollers 67 located near the ground at the front and rear of the center. These rollers are supported in arms 68 which are pivoted for vertical movement to the blocks 69, which blocks are in turn pivoted for i'i-itary horizontal movement in the plates 70 secured to the floor of the vehicle; Rods 7] prevent the rollers 67 from falling too low, and springs 68 furnish resistance to their being raised above their lowest position. As the driving force varies it may-frequently happen that the vehicle will have a bearingon three wheels, ori e of them being either the front or rear auxiliary wheel 67.

in character and never large in amount.

Supported in convenient bear-- The vehicle bein a duocvcle is.

The princi le of balancing, however, makes such thin -bearing intermittent Friction through which it is turned will depend upon Pivoting the arms 68 for vertical-movement and providing springs 7 2 make this third support, or bearing, yielding in nature so that it will not jar the vehicle. this is obvious from the intermittent character of the bearing. A lip 73 on the plate 69 serves as a stop for this vertical movement in case an excessive load should be thrown upon the wheel 67 Pivoting the wheels 67 for horizontal rotary movement makes them in eflect coasters so that they will not slide on the ground in. case'they come in contact with it when the vehicle is turning.

Located in the front part of the vehicle are two treadles 74 which are connected to and operate brake shoes 75 that engage the caused to run more slowly and thus the vehicle be caused to turn in its course. There are therefore, two means for steering the velllCl6,()Il6 by pressure applied to the button.

. heads 49, and the other by pressure applied to the treadles 74] The first accomplishes its result by an unequal distribution of power between the wheels 21 without wastmg any of the power furnished, and conseq ueiitly is the one that will ordinarily be employed bna level or going up grade, The second accomplishes its result checking the velocity of the wheels and is consequently the one which will be usually employed when going down grade or when it is desired to run very slowly on a level.

it may happen from unequal adjustment of the springs 44, or from unequal friction in the connections to the wheels 21,"or from some other cause not readily discernible, that the wheels 21 will be driven at unequal speed and consequent] y that the vehicle will normally run to the ri ht or left in the arc of a large circle instead 0'? in a straight line. To overcome this dillicultya spring 76 and nut 77 is placed on each rod 47 in a convenient place or adjustment. The tensions of these springs counteract each other, and if their tensions are equal their action is equivalent to that of the downward. inclination of the in their mid position.

hicle at any time develops a tendency tov arms of the lever 42, namely, a tendency to hold all of the parts connected to lever 42 if, however, the vedepart from a straight course, that tendency canbe overcome by adjusting one or the other of: the nuts 77 so as to vary the tension of the corresponding spring 76.

l. The combination with a driving inember furnishing a constant power at a constant speed, and a driven member subjected to The necessity of variable resistances, of avariablespeed mechanism COIIHGCtlIIg tlIG two, and automatically operating means i or adjusting said vari able speed. mechanism so that the driven member will absorb a constant power under all changes of resistance.

. 2. A driving disk, a roller in contact with the face of said disk and subjected to varying resistances to being driven, and automatically operating means for controlling the position of said roller so that its distance-from the center of said disk and its resistance to being driven ill equal a constant torque onv said driving disk.

3. A driving disk and adriven disk, a roller between the two and in contact with the faces of both so as to serve as a means of conveying power from the driving member to the driven member, a constant force applied to the driving disk'anda variable resistance applied to the driven disk, and automatic means for shifting said roller on' the faces of Slitl disks.

4.. In combination with a motor furnishing a constant power at a constant speed, an automatic device for transforming the output of said motor into a constant power at avariable speed.

5. A driving roller and a driven disk in contact "with each other, a movable support for said roller so arranged that the roller may be inclined with respect to said disk, a weighing device for iressuring the force of trans irission between sid roller and said disk, and mems by which s -id weighing device will operate ssidsupport so as to shift the position of said roller on said disk.

6. The combination nith two disks and a roller between them serving to convey power from one of s2id disks to the other, a pivoted sunport for Sci-ill roller, means for inclining said,support, end ireens for causing said roller to autoi'neticzlly irove axially on its support n hen s: id support is so inclined.

i A ITOtOI, 9F pair of v. heels, independent connect "ons from the motor to the wheels for driving them, a variable speed inechanfor controlling the changes of speed, and

means for controlling the governor so as to vary the speed of the wheels with respect to each other. e

9. In a-variable speed mechanism, a governor for automatically changing the speed so that a variable resistance will absorb a constant amount of power, and means for adjusting said governor so that its ehange of speed will correspond to the transmission of a diflerent amount of power.

10. A pairof disks rotating in parallel andv adjacent planes, a friction roller between transmitted.

to be set so said disks and serving to transmit power -from one to the other, a support upon which said roller rotates, means for shifting the angular position of said'support, and means by which aid roller automatic-ally ntoves axially on said support when said support has its angular osit'ion so shifted.

11. A pair 0 disks rotating in parallel and adjacent planes, a-friction roller between said disks and serving to transmit power from one to the other, a device for weighing the amount of power so transmitted, and means whereby said Weighing device will act to maintain the transmitted power at a constant quantity.

12. A pair of disks rotating in parallel and adjacent planes, a friction rollerbetw een said disks and serving to t nsmit power from one to the other), a device for weighing the power so transmitted, means whereby the weighing device wi mitted power" means for adju that a different "ant quantity, and weighing device so omit of. power willbe 13 The cwihination with a vehicle, a

' and steering mechanism therefor.

' to cause the vehicle to normally follow :1 pi ribed course, and means for manually guiding said vehicle into some other course without disturbing the adjust ment of said devices. 7

14-. The combination with a'motor driven vehicle, of a balanced steering device therefor, means for adjusting the balance of said steering device so as to cause the vehicle to norn'mlly follow a prescribed course, and manuallvoperated meansfor disturbing the nornml balance so as to cause the vehicle to tcn'lporarily follow a course different from its prescribed one.

15. A disk and a friction roller incontact therewith for the transmission of power, means for weighing the power transmitted, and means whereby upon the power varying from a predetermined quantity said weighing device will incline the axis of said roller from its normal position so as to-cause said roller to travel radially over the face-of said disk. 16. A pair of disks on parallel and adjacent shafts, a friction roller between the faces of said disks and serving to transmit power from one to the other, a rod upon which said roller is mounted and rotates, and automatic means for causing said roller to move axially on said rod so as to vary its position on said disks.

17. A pair of disks on parallel and adjacent shafts, a friction roller between the faces of said disks and serving to transmit power fromone to the other, a rod upon which said maintain the trans-' ljustable devices adaptedroller is mounted and rotates,a ivoted support for said rod at the axis 0 one'of said disks, and means-for giving said rod a-linu'ted movement about its pivot.

18. par of disks on parallel and adjacent shafts, a friction roller between the faces ofsaid disks and serving to transmit ower from one to the other, a rod upon Whic said roller is mounted and rotates, a pivoted support for one end of said rod at the axis of one of said disks, and a spring support at the other end of said rod.

19. A air of disks on parallel and adjacent shafts, a roller' for transmitting power from one disk to the other, a rod upon which 30 said roller is mounted and rotates, a pivoted support for one end of said rod at the axis of one of said disks, a spring supportfor the other end of said rod, and means for adjusting the tension of said spring. i

20. A driving disk, a rod pivoted atv the axis of said disk and supporting a roller in contact with the face thereof, and automatic means for causing said roller to move axially on said rod so as to vary the position of the roller on the face of the disk.

21. A driving disk, friction rollers in contact with opposite faces of said disk, an inde pendent wheel driven byeach roller, and means whereby said rollers may be shifted independently or together on the facesv of said disk.

22. A driving disk, friction rollers in contact with opposite faces of said disk, an in de endent wheel driven by each roller and suiijected to varying amounts of resistance, and means whereby the positions of said rollers on said disk are controlled by the resistance encountered by said wheels.

23. A driving disk, friction rollers in contact with opposite faces of said disk, an independent wheel driven by each roller and subjected to varying amounts of resistance, and means for varying the positions of said rollers on said disk so that the sum of the resist- 1 0 ances of said wheels will equal a predetermined torque on said disk.

24. A driving disk, friction rollers in contact with opposite faces of said disk, an independent wheel driven by each roller and sub 115 jected to varying amounts of resistance, and aweighing device for controlling the ositions of said rollers so that the driving oree of said disk will be equal to a constant torque. i

25. A driving disk, a pair of independently 120 movable driven disks the resistance of which are independently variable, and means for varying the speeds of the driven disks so as to ilpaintain a constant torque on the driving dis 26. .A driving disk, a pair of driven disks subjected to variable resistances, a'governor' for varying the speed of the driven disks so as to maintain a constant torque on the driving disk, and means for controlling the div ision of power between said driven disks so as to cause them to run at any desired speed relatively to each other.

27 A driving shaft, a pair of independently movable driven shafts each of which is independently subjected to variable resistances, 3, governor for varying the speeds of the driven shafts so that the sum of their resist ances, will represent a constant torque on the driving shaft, and means automatically'acting to cause said driven shafts to rotate at an equal speed. i

28. A pair of independently movable shafts, a governor for independentlyvarying the speed of either shaft in accordance with the resistance encountered in driving it,,and

means automatically acting to restore anequality of speedin said shafts when the equality has been distributed by unequal resistance.

29. A air of independently movable driven disii disk rotating between the driven disks, friction rollers serving to-transi'nit power from the driver to the driven, a governor for mainstant quantity, means for varying the relative. speeds of the driven disks without dis turbing the action of the governor, and means automatically acting to cause said driven disks to rotate at an equal speed;

30. A driving disk and a pair of driven disks, a separate roller -for transmitting power from the driving disk to each driven disk, a supporting rod-for each roller, a pivot for each rod at the axis of the driving disk, means whereby either rod may turn on its pivot soas to cause a variation in the radial position of'its roller, and stops for limiting the pivotal movement.

31.. In a motor vehicle, a pair of independently movable wheels, a driving shaft,independent connections from the driving shaft tov each wheel, an independent variable speed mechanism in each connection, a governor controlling said variable speed mechanisms so that the total power transmitted to said wheels will be a constant quantity under varying resistances, and means for control ling said governor so that the power will be divided between said wheels in any desired ratio.

32. In combination with a vehicle and a motor for driving it, independent connections from said motor to independently movable driving wheela. means whereby varying'the speed of said driving wheels with respect to each other will vary the course of said vehicle, a variable speed mechanism in each connection and means for controlling them to cause such change of course, and means automatically acting to return said vehicle to a straight course.

33. In a motor vehicle, a pair of independently movable driving Wheels, a flange pros upon'a common axis, a driving jecting from the side of each wheel, a friction roller engaging each flange for driving its wheel, a motor, independent variable, speed mechanisms between said motor and said friction rollers, and means for controlling said variable speed mechanisms so as to cause said driving wheels to run at any desired relative speed.

34. In a vehicle, two motors having their shafts in line, a wheel mounted on the ends )f both shafts, means whereby said wheel in ay be driven by either motor independently or by both to ether, and means for transmitting power from said wheel to the driving wheels of said vehicle.

35. In a vehicle, two motors having their shafts in line, a disk mounted upon the ends of both shafts, means whereby said diskmay be driven by either or by both motors, means for transmitting to the wheels of the vehicle the power delivered to said disk, and means for dividing the transmitted power in any desired ratio between -diifeient wheels;

36. In a vehicle, a rotatory disk, two motors, means whereby saiddisk may be driven by either or by. both motors, means for transmitting power from. said disk through independent variable s eed mechanismto independently mova ale driving wheels on said vehicle, and means for con trolling said variable speed mechanisms so that the speed of said driving wheels and their resistance to motion will. equal the amount of power deliveredto said disk.

37. In a vehicle, two motors, connections by which either or both of which may drive said vehicle, and a device by which a constant speed of said motors is transformed into a variable speed of said vehicle, said variable speed-being automatically adjusted 0 so that the product of the speed of the vehicle by its. resistance to motion will equal the power delivered by said motor or motors.

38. In a vehicle offering continually vary-' ing resistances to being driven, a motive power adjustable for the delivery of any one of several predetermined amounts of power,

a governor for automatically adjusting the speed of the vehicle to corres end to the resistance encountered and a eiinite amount of power supplied, and means for adjustin said governor for some other amount 0 power.

39. In a vehicle offering continually varying resistances to being driven, a motive power, a governor for transforming the constant speed of the power supplied into a variable speed of the vehicle proportioned to the resistance encounteredpmeans for varying the amount of power supplied, means for ad- 5 justing the governor to suit such variations of power, and means for controlling both the power supply and the governor by the movement of a single lever.

40. In combination with a vehicle and a 1 motor for driving it,- independent driving varying thespeeds of-said Wheels 'as their resistance var1es',-and' a brake by which 1 additional resistance may be applied to either wheel.

42. In a friction driving device, friction rollers through which power is transmitted in difierent directions, a spring support undereach roller the tension of which .determines the amount- 0f A ower transmitted through the connected ro ler, and means for shifting the spring tension in any desired amount from one roller to another.

43. In a friction, driving device, friction rollers through which power is transmitted in different directions, a. spring supportunder each roller the tension of which determines the amount of power transmitted through the connected roller, means for increasing or decreasing such tension equally for each roller, and means for shifting such tension from one roller to another'without varying the'total amount.

" 44. In a friction driving device, friction rollers through which power is transmitted -in different directions; a spring support for each roller the tension of which determines the amount of'power transmitted through the connected roller, andmeans for increasing or decreasing the tension for each roller equally.

45. In a friction driving device, friction rollers through which power is transmitted in: different directions, a spring support undereach roller the tension of which determines the amount of power transmitted through the connected roller, a lever for varyingthe tension equally for each roller,- and a second lever for transferring tension from one roller toanother. I

46. In a friction driving device, a friction roller through which power is transmitted, a spring support for said roller the tension of which determines the amount of power 4 transmitted, a lever for increasing and decreasing the tenslon under sald'roller, and

connections to said lever for correspondingly increasing and decreasing the-power supply to saidroller.

' 47 A'pair of parallel shafts, a disk on each shaft, a rod pivotedon one'of said shafts and extending between the faces of the disks, and a roller mounted to rotate u on fsaid rod and to convey ower from the ace of one disk to the face 0 the other.

48. A pair of parallel shafts, a disk on each shaft, a rod pivoted at-the axis of one shaft and extending-between the faces of the disks,

a roller mounted upon-said rod and engaging the faces of both disks so as to transmitpower from one to the other, andmeans for giving said rod a small. movement on its pivot. I

Signed by me at Chicago, Illinoisthis 26th day of July, 1899.

CASPER L. REDFIELD.

.Vvitnessesz' p HowARD A. REDFIELD, H. C. FISCHER. 

